Let x denote the IQ of an individual selected at random from a population. The value of x must be a whole number. Suppose that the distribution of x can be approximated by a with mean value 110 and standard deviation 15. Approximate the following probabilities. (Hint: See Example 7.34. Round your answers to four decimal places.) A USE SALT (a) P(x = 110) 0. (b) P(x s 120) 0.7475 (c) P(x < 120) (Hint: x < 120 is the same as xs 119.) 0.7257 (d) P(75 s x S 145) 0.9802 You may need to use the appropriate table in the appendix to answer this question.

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Let x denote the IQ of an individual selected at random from a population. The value of x must be a whole number. Suppose that the distribution of x can be approximated by a normal distribution
with mean value 110 and standard deviation 15. Approximate the following probabilities. (Hint: See Example 7.34. Round your answers to four decimal places.)
A USE SALT
(a) P(x = 110)
0.
(b) P(x s 120)
0.7475
(c) P(x < 120) (Hint: x < 120 is the same as x s 119.)
0.7257
(d) P(75 < x < 145)
0.9802
You may need to use the appropriate table in the appendix to answer this question.
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Transcribed Image Text:Let x denote the IQ of an individual selected at random from a population. The value of x must be a whole number. Suppose that the distribution of x can be approximated by a normal distribution with mean value 110 and standard deviation 15. Approximate the following probabilities. (Hint: See Example 7.34. Round your answers to four decimal places.) A USE SALT (a) P(x = 110) 0. (b) P(x s 120) 0.7475 (c) P(x < 120) (Hint: x < 120 is the same as x s 119.) 0.7257 (d) P(75 < x < 145) 0.9802 You may need to use the appropriate table in the appendix to answer this question. Need Help? Read It Master It Viewing Saved Work Revert to Last Response
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